Description

Copyright 2015

Edition: 1st

Downloadable Video

ISBN-10: 0-13-402659-4

ISBN-13: 978-0-13-402659-6

60 Minutes of Video Instruction

Understanding the Shortest Path First (SPF) Algorithm LiveLessonsNetworking Talks is the primer you need to truly understand SPF calculations. It’s time to really understand how Link State protocols work and why some of the rules you encounter with this family of protocols exists.

Description

Understanding the Shortest Path First (SPF) Algorithm LiveLessonsNetworking Talks explains basic SPF calculation through a combination of bullet points and whiteboard demonstrations. The lessons also demonstrate how SPF takes into account Equal-Cost MultiPath (ECMP) and multi-access links such as Ethernet. By understanding SPF calculations, engineers can better understand and troubleshoot Link State protocols.

In Lesson 5, using the network and Link State Database previously drawn, an SPF calculation resulting in a loop-free, lowest-cost tree from the root to every node in the network is demonstrated.

Lesson 6: Designated Routers and Pseudonodes

SPF calculations require a graph of nodes and links. Lesson 6 discusses, using the whiteboard, how a multiaccess network such as Ethernet can be represented in such a graph.

Lesson 7: Equal-Cost Multipath (ECMP)

Lesson 7 discusses types of equal-cost paths and modifications of the SPF algorithm to support them.

Lesson 8: ECMP and Pseudonodes

A special case involving ECMP in which one of the paths crosses a pseudonode can cause an interesting calculation problem. The problem, and the SPF rule modification to prevent it, is demonstrated on the whiteboard in Lesson 8.

Lesson 9: Problems with Link State Protocols and Conclusion

Lesson 9 discusses briefly common problems in Link State networks and the features of Link State protocols that solve them. The course is then concluded.

About LiveLessons Video Training

LiveLessons Video Training series publishes hundreds of hands-on, expert-led video tutorials covering a wide selection of technology topics designed to teach you the skills you need to succeed. This professional and personal technology video series features world-leading author instructors published by your trusted technology brands: Addison-Wesley, Cisco Press, IBM Press, Pearson IT Certification, Prentice Hall, Sams, and Que. Topics include: IT Certification, Programming, Web Development, Mobile Development, Home and Office Technologies, Business and Management, and more. View all LiveLessons on InformIT at: http://www.informit.com/livelessons